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    SubjectRe: 2.6.31-rc9 kernel BUG and mvsas
    Andre Tomt wrote:
    > Jeff Garzik wrote:
    >> On 09/09/2009 12:30 PM, Thomas Fjellstrom wrote:
    >>> No errors on that disk. Other than the one above, and its more of a
    >>> warning.
    >>> However, I just rebooted to add some extra drives, thinking
    >>> everything was
    >>> working a little better now that I've updated to 2.6.31-rc9, I'm
    >>> treated to
    >>> the following two messages right after boot (and a system lockup to
    >>> boot):
    > Jeff & Co,
    > Just chiming in with a "me too" comment.
    > Identical issues with the AOC-SASLP-MV8 card with 8 Seagate Barracuda
    > 7200.11 1.5TB drives using the mvsas driver. Creating a md raid array
    > seems to trigger it nearly instantly, however other loads do not trigger
    > it as fast (if at all, only tested briefly with paralell dd).
    > Not sure if its related in any way, but I also noticed that with
    > parallell dd read on all ports, the card/driver tops out at 600MB/s even
    > though the card is in a northbridge connected slot running in x4 mode.
    > Only the first 4-5 ports run at nearly full speed, while the rest barely
    > gets to read any data at all. To illustrate, it looks sort of like this
    > in iostat -m:
    > sda 122
    > sdb 122
    > sbc 120
    > sdd 121
    > sde 100
    > sdf 10
    > sdg 5
    > sdh 5
    > Starting to think this driver has some issues with concurrency.. The
    > other controllers have no issues saturating all their ports, even if
    > they are on a south bridge connected slot.

    Err, saturating all the disks. I'm not expecting 300MB/s*8, even though
    it would be very cool 8)

    > Same disks/setup works just fine on AHCI and sata_mv controllers on the
    > same computer, easily pushes 8-900MB/s with md software raid5/6 (Yipes!)

     \ /
      Last update: 2009-11-04 02:07    [W:0.021 / U:178.148 seconds]
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